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An excellent question and I hope the powers that be will let us know. I'm not sure I've seen a full pie, but the more complete seems to be based primarily on participation: how active someone is on the hotline (asking and answering); how many recipes have been submitted generally (i.e., to contests and otherwise); and how many contests have been won by a contribution. While I haven't seen full pies, it is clear there is a "senior" level that some have achieved that allows an individual to be designated a "recognized authority on [blank]"; I'd be interested in how that is achieved as well.
Amanda and Merril have full pies!
amysarah is a trusted home cook.
Being a 'recognized authority' is sort of like pie a la mode status.
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